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Mar 14, 2022 · This is a collection of free biology worksheets, notes, handouts, slides, study guides and quizzes. Most content targets high school, AP biology, genetics, anatomy/physiology, immunology, and biology 101 and 102 in college. There is also biochemistry and physics for biologists. However, some resources are at the grade school and middle school ...
homeostasis – maintenance of a constant internal environment. the internal environment of an organism is the conditions in which its cells function. in mammals, a cell’s immediate environment is the tissue fluid that surrounds it. the composition, pH and temperature of tissue fluid are kept constant by exchanges with the blood (see ch-8 ...
Cell Specialisation (1.1.3) Cells specialise by undergoing differentiation: a process that involves the cell gaining new sub-cellular structures in order for it to be suited to its role. Cells can either differentiate once early on or have the ability to differentiate their whole life (these are called stem cells).
synthesizes proteins and lipids, releases them to ER lumen. some will be secreted from the cell (hormones, enzymes), some will become new membrane for the cell or its organelles, or other protein parts of organelles. once in the lumen the protein can be modified (pieces removed, sugars added) smooth ER.
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Inside the cell, the nucleus is surrounded by the cytoplasm, a semifluid medium that contains organelles. The plasma membrane regulates the entrance and exit of molecules into and out of the cytoplasm. Plant cells (but not animal cells) have a permeable but protective cell wall, in addition to a plasma membrane.
This textbook is focused specifically on the principles and concepts of a foundational Cell Biology course. The book takes a more conceptual approach that highlights how scientists study cells, and how to analyze and interpret experimental results. Rather than focusing primarily on historical experiments that were key to our understanding of cells, the book explores a range of more modern ...
Study biology online free by downloading OpenStax's Concepts of Biology book and using our accompanying online resources including a biology study guide.
